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Composition and performance characteristics of artificial magnets

The composition of the artificial magnet is based on the magnetization of various metals, according to the need. A magnet approaches (touches) a magnetic substance that is induced at one end to form a namesake pole and at the other end to form a namesake pole.

Classification of magnets A. Temporary (soft) magnets. Meaning: Magnetism is transient and disappears when the magnet is removed. Example: iron nails, wrought iron

Classification of magnets B. Permanent (hard) magnets. Meaning: Magnetism can be retained for a long time after magnetization. Example: the steel nail

The above information is summarized as follows: according to the principle of electromagnetic induction, a strong current can generate a strong magnetic field, and the use of strong magnetic field to magnetize ferromagnetic substances, and because of the different magnetization characteristics of different substances, some substances are easy to magnetize, and not easy to lose the magnetic (magnetic loss), can retain the magnetic for a long time. Magnetizing this piece of material produces a magnet. A hard magnet is magnetized with a magnetizing machine.

According to the principle of electromagnetic induction, an electric current can generate a Magnetic field that uses a strong field to magnetize a hard Magnetic substance. A Magnetic Material, commonly called a magnet. It is actually several different things: a common magnet, such as the one used in a common loudspeaker, is a ferromagnetic. They are used in the process of hot rolled steel from the steel billet rolling off the surface of iron scale (plate shaped iron oxide), after removing impurity, crush, add a small amount of other substances on the steel mould of extrusion forming, and then (hydrogen) in reducing furnace sintering, make some oxide reduction in ferrite, cooling, and then put exciter in the magnetization.

Permanent Magnets are better than this: Permanent Magnet is steel, which consists mainly of a higher content of nickel, in addition to iron. It is generally melted by medium frequency electric furnace (only 100 kg per furnace), casting molding, because some of its plane has precision requirements, generally to use a grinder grinding processing. And then magnetized into a product. This type of magnet is used in all kinds of electricity meters. A better magnetic material is Ndfeb Neodymium Magnet. They are substances containing the rare earth elements neodymium, iron and boron.

Production is produced by the method of hard alloy: after Pulverizing – Mixing – Molding – Sintering – Finishing – Magnetization. This kind of magnetic field strength is higher, the performance is better, the price is more expensive. It is only used in a case of equipment. The stepper motor rotor in the electronic watch is the magnetic levitation train must use this magnetic material.

Ferrite permanent magnetic materials are: strontium-ferrite permanent magnetic materials and barium ferrite permanent magnetic materials, which have isotropic and anisotropic points, speaker magnet is generally used ferrite permanent magnetic materials; The main metal permanent magnetic materials are Alnico magnetic and rare earth permanent magnetic materials. The rare earth magnets were further divided into Smco Magnets and NdFeb Magnets. Rare earth permanent magnet materials are made by powder metallurgy process.

Alnico 2 3 4 5 Companies

Post time: Aug-27-2022